Pipeline
Basic Concepts
2.2 Pipeline
On the command line, use ! to connect elements:
gst-launch-1.0 videotestsrc ! autovideosinkThis pipeline uses videotestsrc to generate a test pattern, and then lets autovideosink select a display plugin automatically.
Production applications usually create and control pipelines through the GStreamer API. gst-launch-1.0 is mainly used to validate designs, reproduce issues, and run performance tests.

